Enameling oven



J. A. MELLER ENAMELING OVEN Sept. 2929 i925.

Filed Novv 14 1921 1 1 e l |l fil Patented Sept. 29, 1925.-

UNITED STA TES JOHN al mmm, or amr'rown, N'nw Yoan, Y' ovmf. l

Application alga iv'mber 14, im. f strati n. :$15,199.v l

To all whom it may concern.:-

Be it known that I, JOHNVA. Minima', a citizen of the United States ofAmerica,

'and a resident o Tarrytown, county of Westchester, and State. of -NewYork, have invented certain new anduseful Improvements in EnamelingOvens, of which thefollowing is a full, clear, concise, and exactdescription, such as will enable othersskilled in the art to' which theinvention relates to make andY use the same, reference .being madetherein to the accompanyingdrawings,

orV baking operation without materially 'in-4 terfering with'ordetracting from, `the aiy the provision ofa baking oven that iiicheapwto manufacture,l easily assembled, i1s coin-V `on vehicles,partsthereof, and other objects that have been subjected to a coatingprocess. Another objectv of the invention 1s the y,provision of meansfor removing the gases, odors, and impuritiesincident to thedrym'g orbaking| of thecoating during the drying ciency ,of the heatingarrangement-y j .A still furtherA object' of the invention is posed offew parts, thati is simple in construction and not likely to .get outoforderf." Other and further objects ofthe invention f will appear asthe description) proceeds;v

On the drawing: f

,Figure 1 is a side-elevation `of the' ovenI with Yparts in section andparts broken away; Figure 2 isa front elevation ofthe/'same with partsin section and parts broken away.

In ovens for drying or baking protective-., coatings on vehiclebodiesand parts-'thereofit has been heretofore the custom t empioy fovens of large productive capacity;- In other words, drying or bakingovens of this nature have been employed almost exclusively bymanufacturers and others doing the original painting, varnishingorenameling of vehicles in quantity.

The present invention contemplates theemployment of a small oven whichis espe-` cially adapted to be employedin'garages or by others doing arecoating business. evident, however, that the device 1s notso It isYlimited in its use, but may bef employed for'.

drying or baking" original coatingson ve`" hiclesor other articles andtreating them on an extensive scale.

For the purpose ofy simplicity of` illustra-X.

tion and convenience of description, a device is shown more or lessdiagrammaticallyl that is adapted to accommodate a single vehicle bodyand parts thereof.

On the drawing, the reference numeral 1Q designates a. support such` asthe door of a garage or other building. Thev floor is usu-` ally made ofconcrete and mounted thereon is the bottom wall .or iioor 11 ,of theoven. This ioor may be made from an suitable material, such asfrom thecommercial magnesia block. The door 11` supports and 'has attachedthereto the rear end wall 13 and the side walls 14. The top wall 15 issecured to,`.and supported by, the end iand sidewalls. The front endwall comprises two doors 16 `and 17 which are hinged to the .side walls14. The freeed'ge of the door 16 is provided with, an extension 19 whichisI` adapted to' overlapjthe reeedge of the door seal the joints betweenthe meeting edges of the two doors. j

., :.Any suitable latching means maybe provided `for securing the doorsfin closed posivsupports 18 secured to the front ends of the 417 whenthe doors are`in closed position'to Y tion.,`.As, sl1own" on. the drawinthe free f edge of the door lis provided with the pivoted ,latch- 19ywhich has attached thereto 'the longitudinally fmovable latch bolts 20,21 which are'adaptedfto engagekeepers 22 and 23 securedto the 'top .and`bottom walls,\re j spectively.

Wh'le I'ha've shown vthe oyen as being rectangular in form and ofcomparatively small dimenslons ,it is to be understood thatit may be ofan '-suitable form and dimensions.

A* AQaQ ,Q51 `to vthe rear wall adjacent the ,door fo'the @ovenfis anai'rl chamber 24,-,` 'of any" suitable form and material. As shown onthe drawing, the air chamber is rectangular in form yand may be'maderom'sheet,

metal and extends the full length of one dimansion of the oven as acrossthe rear end thereof. The chamber 24 is divided into an upper air inletchamber 25 and a lower ventilating chamber 26.-r The partition 27 thatdivides the chambers 25 and 26 is inthe form of an inverted "Y with'avery broad.

base. By this arran ement suicient spaces are provided, for a arge airoutlet in the middle portion of the rear wall of the lower chamber and alarge air inlet in each end of the front wall of the upper chamber,without unduly increasing the dimensions of the air chamber. In ordertoinsure uniform ventilation across the entire width of the oven, theVentilating chamber`26 is provided ,along the lower portion of its frontwall with the inlet apertures or openings 28 extending the full lengthofthe chamber.0 The chamber is also providedin its rear wall at( thecenter thereof `with a large out-let opening 29 the area of which, mustbe at least as large as the combined areas of the ventilating openings28. A Ventilating pipe or conduit ,30 is'secured about the opening 29vvcured to the valve pivot is adapted to be adjusted by means of a boltor rod 33a which, in turn may be held in adjusted position by means of aset screw` 33h, in the usual manner. i

The valve 32 is provided with a small central opening in order toprovideffor a certain amount of ventilation even though the valve beentirely closed.

For the purpose of rapidly clearing and cooling the oven or, undercertain conditions, for regulating the heat thereof, an arcuate pipe orpassage 35 extending through the top wall and communicating with theextension 31 may be provided. This pipe is adapted to be closed by themanually operated valve 36 during the normal operation of the oven. Thevalve 36 may be held in adjusted position by any suitable means such asthe set screw 36 engaging the link 38 whichI operates the valve crankarm 39.

j In orderfto insure equal distribution of the air in passinginto theoven, the top wall of the air intake chamber 25 is provided with aseries of outlet openings or apertures 37 extending the full length ofthe-chamber.'

The chamber 25 is also provided with large air inlet openings 40 and 41in `its rear wall i yadjacent each end thereof.

The combined areas of the large openings 40 and 41 must be at least aslarge as the combined areas of the small openings37. Hollow members 42and 43 secured about the openings 40 and 41 extend through the rear wall13 and thus placeithe air chamber in communication with the externalatmosphere.

A series of suitable heating devices are arranged at the rear of theoven above the air chamber-25 in such a position that the air ascendingfrom the air chamber 25 will pass about the heating elements and becomeheated to the desired temperature. Any

`elements 45 for supporting fenders 46 or other articles during thedrying or baking operation. f

In the operation of the device, if an automobile body is to be treated,the body is removed from the chassis, and its fenders, etc.

lare removed. The body 47 is mounted on a suitable supporting means suchas the truck 48, and after the protective coating has been j applied tothe body and its parts, the truck 48 is run into the oven 12. Thefenders and other parts are properly suspended from the supports 45after which the doors 1G and 17 are secured in closed position. The heatis now turned on and the air from the out-- side entering through theapertures 40 and 41 into the air chamber 25 passes upwardly through theoutlet openings 37 and ascending about the heaters 44 is heated to thedesired temperature, circulates about the coated articles for drying orbaking the same. Parts of the air and obnoxious gases continually escapethrough the pipe 30 and its extension 31, and by adjusting the valve 32the circulation of air within the oven 12 may be regulated and thenoxious gases removed without materially interfering with the bakingoperation.

By means of this device it is possible to reiinish automobile bodies andparts thereof without removing the upholstery, since by means of thisarrangement it is not necessary to heat the ovenabove the point where it`would injure the upholstery, say 25() to f device may be employed todry paint, varnish and similar coatings employing lower temperaturesthan is required for enamel'ing work.

It will thus be seen that I have provided a drying or baking oven thatis cheap to manufacture and eiiicient in. operation' and one that maybe'installed in almost any garage for the purpose of recoatingautomobiles and parts thereof.

' I claim:

1. In a heat treating device of the class described, a chambery havingan entrance leading thereinto, and a closure for said entrance, heatingmeans located within said chamber, an air intake device located withinsaid chamber in direct communication with the exterior atmospherethrough an opening provided in the wall of said chamber conduitcommunicating with said opening` and lextending upwardly therefrom.

2. In a device of the class described, a chamber provided with anentrance opening leading thereinto, and a .closure for said opening;anair intake device located within the lower portion of said chamber andadjacent the wall thereof opposite said opening, said air intake devicebeing in communication with the external atmosphere, and having aplurality of air inlets discharging directly into saidchamber,I and saiddistributing device yhavingfa plurality of Ventilating' openings leadingdirectly into the interior of said chamber and through whic-h 4openingsgases mayflow from the interior of said`chamber into said air intakedevice and from said device through an opening in the wall aforesaid, aconduit through which gases escaping from the interior of said chamberas aforesaid may flow, a valve forcontrolling the flow through saidconduit, and heating means located adjacent the wall of said chamberopposite the opening leading thereinto, and above said air intakedevice.

3. In a device of the class described, an air chamber for a heattreating device, said chamber consisting of an upper air inlet chamberand a lower Ventilating chamber, said air inlet'y chamber havingopen-ings therein for permitting a uniform flow of "substantially thefull length, thereof, the

rear wall of said upper compartment provided with a large opening ateach end thereof, the front wall of said lower toml partment providedwith a series lof lapertures extending substantially the full lengththereof and the rear wall of said lower compartment provided at itswidest .portion with a large opening, substantially as shown anddescribed.

5. In a device of the class described, a

chamber, means for heating the same, means `:adjacent the lower portionof one side wall of ,said chamber for admitting4 air to said chamber,means below the -a1r admission means and Vadjacent a still lower portionof said side wall of saidchamber for permitting the escape` of air andgases from said chamber, including a conduit for conducting said air andgases away from said chamber, a passage connecting -the upper portion ofsaid chamber and conduit, and a valve in said passage.

v 6. In a heat treating device of-the class described, a chamber havingan entrance. opening at one end thereof, and a closure for said opening;heating means located.

within said chamber and adjacent the wall thereof opposite said opening;and an air intake device leading from the external atmosphere throughthe lower portion of the wall aforesaid and discharging directly intosaid chamber; said chamber being provided adjacent the lower end thereofwith a ventilating outlet opening.

7. In a device of the class described, a chamber having doors at oneside thereof. and heating and Ventilating means adjacent vto anotherside thereof comprising air inlet means vand air outlet means arrangedlow down along sald last named side, the former above the j latter, anda second airoutlet means from the top of the chamber and an air heatersubstantially above 'the air inlet means.

, 8. In a device of the class described, a chamber having doorsat oneside thereof, and heating and Ventilating means adjacent to another sidethereof comprising air inlet means and air outlet means arranged lowdown along said last named side, the former above the latter, and asecond air outlet means from the top of the chamber and an air heatersubstantially above the air inlet means, bothsaid air outlet means beingconnected together outside the chamber".

In testimony whereofI affix my signature.

JOHN A. MILLER.

